raymond



(No Model.) 6 Sheets-Sheet 2.

G. 8u A. RAYMOND.

PULVBRIZER. No. 415,421. Patented Nov. 19,1889.

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(No Model.) 6 Sheets-Sheet. 3.

G. 8v A. RAYMOND.

PULVERIZER.

No. 415,421. Patented Nov. 19, 1889.

(No Model.) 6 Sheets-Sheet 4. G. 8v A. RAYMOND.

PULVERIZBR.

110,415,421. Patented NOV. 19, 1889.

111111111111 l N 1r lllllllillil| MII e IMM/w, 1km x AMX M www No ModeM 6 Sheets-Sheet 5.

G. & A. RAYMOND.

PULVERIZBR.

110,415,421. Patented Nov. 19, 1889.

11mm '0R WW1 www SS VRWMQX UNITED STATES PATENT OFFICE.'

GEORGE RAYMOND AND ALBERT RAYMOND, OF CHICAGO, ILLINOIS, ASSIGN- ORS TO TIIE RAYMOND BROTHERS IMPACT PIILVERIZER COMPANY, OF SAME PLACE.

PU LVERIZER.

SPECIFICATION forming part of Letters Patent No. 415,421, dated November 19, 1889.

Application iiled September 4, 1888. Serial No. 284,585. (No model.)

To all whom it may concern: ing-chamber, and having suitable belt-pul- Be it known that we, GEORGE RAYMON leys. The upper portions of the casing are and ALBERT RAYMOND, of Chicago, Illinois, preferably formed in four parts, comprising have invented certain new and useful Ima top portion 10, two end portions 11, and a provenients in Pulverizers, of which the folrear wall 12. The various portions of the 55 lowing is a specification. casing are secured together, preferably, by

Our invention relates to pulverizing maheaded bolts and nuts, as shown in the drawchinery in which the reduction takes place ings. The casing is projected in astraight within a pulverizing-chamber, and the effectline from a point on the periphery between 1o ive agents for imparting motion to the matethe vertical and the longitudinal axes of the 6o rial undergoing reduction and for the pulmachine, and the end walls are projected corverization thereof are beater-arms set radirespondingly to provide feed and discharge ally upon a rotating shaft, assisted by propassages 13 14, respectively. These two pasjections or attrition-surfaces disposed about sages are separated by a divisional wall or 15 the peripheral wall of the pulverizing-champartition, which may be triangular in form, 65 ber. as shown in Fig. 4, one of its sides v15 extend- Our improvements further relate to a puling parallel to the casing 10. Another 16 verizing-machine so constructed that the feedforms a deflecting-surface for the incoming ing, discharging, and sifting of the material feed, and a curved portion 17 forms a part of zo is automatic, and the material is caused to the periphery of the pulverizing-chamber. 7o enter and leave the pulverizing-chamber on The peripheral wallof the pulverizing-ehamt the periphery thereof, and to travel substanber is lined with sectional plates 18, which tially around the chamber in zigzag lines. will preferably be made of equal length with In the drawings, Figure 1 is a rear elevathe chamber and of anyv convenient width,

tion showing the form of pulverizer which We three of equal width being shown in the draw- 7 5 prefer, and `particularly the feed and disings covering the casing 8, while the upper charge openings thereof. n Fig. 2 is a side eleportion of the chamber having its continuity vation, a part of the conveyer-trou gh being in broken by the passages 18 14, the lining-plates section, of a pulveriz'er having a boltingwill be made to correspond in their width and 3o chamber through which the material is fed curvature. Each of these lining-plates will 8o and in which the ground product is sepabe provided with a number of projections 19, rated. Fig. 3 is a plan view, partly in secLa which are so disposed as to cause the matetion, of the pulverizer, the upper portion of rial undergoing reductionl to pass around the the casing being removed to show the inte- .chamber in a zigzag course. We prefer to rior construction. Fig. 4 is a vertical secconstruct the plates 18 andthe projections 19 85 tional view in elevation of the pulverizer andv of chilled iron. The projections may be cast bolting-chamber, a part of the latter being integral with the plates and of any form debroken away. Fig. 5 is a face representation sired; but we prefer to make them substanof an annular lining-plate for the end of the tially pyramidal in cross-section, one side be- 4o pulverizing-chamber. Fig. G is a perspective ing slightly concave and one corner, as 20, 9o view of a section of lining-plate for the pebeing sharp. These projections are disposed ripheral Wall of the chamber, and Fig. 7 is a .in rows circumferentially of the chamber and side elevation of a pulverizing-machine inat an angle to the longitudinal axis of the tended to be used in connection with a succhamber, or in zigzag lines, as clearly shown tion-fan to remove the pulverized material. in Fig. 4, the sharp edges or corners project- 95 In the drawings, S represents a semi-cylining opposite to the direction of motion of the drical easing forming the lower portion of the material, so that the material will not find lodgpulverizing-chaxnber, upon extensions Wherement thereon, but will be deflected with slight of are formed journal-bearings for a rotatable friction.

5o shaft 9, carried centrally across the pulveriz- The annular lining-ring 21 (shown in Fig. 5) roo has a corrugated surface, and its substance is of a width equal to the height of the projections 19. This ring is preferably cast in a number of sections for convenience in placing them, and all of these lining-plates are provided with holes to adapt them to be riveted or bolted to the casing. The shaft 9 has hubs formed each in two parts 22 23, between which are placed two steel or iron disks 24 of the required diameter. A washer 25, placed between these disks and bolted thereto,provides a space between them to receive the beater-Shanks. The beaters 26 have straight shanks of the same thickness as the washer 25, which are adapted to be clamped between the outer edges of the disks 24 by bolts or rivets. The beaters are turned at an angle to the direction of motion, so as to sweep the material toward the ends of the chamber, and the several beaters, having a common support-a'. e., carried by the same hub-are alternately disposed, asv shown in Fig. 3. These beaters are arranged to operate close to the periphery of the chamber and between the rows of projections, and from their arrangement with reference to the direction of their motion, as well as with reference to the said projections, it is apparent that the material will have imparted to it a sinuous or zigzag motion, and'that it will thus be subjected to a succession' of blows from the beaters and rapidly red uced, whereas if thebeaters simply sweptthe material around the chamber in straight lines the reduction, if effected at all, would be much slower.

We prefer to connect the pulverizer to a bolting-chamber 27 which has an opening registering with the feed and discharge openings of the pulverizer. This chamber has its sides and one end inclined or hopper-shaped toward the bottom, and it is provided with the usual conveyer 28. The feed-hopper 29, as shown, is secured upon the side of the separator opposite the pulverizer, and the material is fed to the pulverizing-chamber by a feed-trough 30, having aperforated bottom 30, which serves as a screen to separate the fine from the coarse material. The reciprocaton of this trough is eifected by means of a pit'm'an 31, having a crank-connection with a driving-wheel 32, driven by suitable gearing.

Constructed as above described, the oper' ation is as follows: The material is fed into the hopper, and, dropping down on the trough, is fed forward by the reciprocation of the latter until it discharges into the pulverizingchamber through the feed-passage 14, entering the chamber, so as to be caught at once by the rotating beaters. These beaters are rapidly revolved within the chamber and generate therein strong currents of air, which take up the material and cause it to move rapidly about the chamber. The material, being `heavier than the air, will be thrown to the'` periphery of the chamber, and, as before explained, will have its direction of motion constantly changed by the projections 19, acting in conjunction with the beaters. A constant stream of material, pulverized and unpulverized, will be thrown out of the chamber by the action of the beaters, and, in obedience to the law of centrifugal force, into the bolting chamber, and will there drop down upon the screen conveyer. The iine material will pass through the mesh of the screen and reach the conveyer, while the coarser particles will be carried down with the ingoing feed and discharged again into the pulverizing-ohamber.

It may be found expedient to use the pulverizer herein described in connection with a suction-fan to take the material out of the pulverizer. In such case we prefer to employ a separatingchamber such as 33, Fig. 7, having a discharge 84, to which the suctionfan is connected. In this instance the feedhopper 29 will have a partition such. as shown by dotted lines 40, Fig. 7, and a partition 41 is also preferably placed within the separating-chamber. yThe material passes outside the partition 40 and the air inside, and a strong current of air will be drawn upwardly from the end of partition 41, as indicated by the bent arrow, and this current, joining that issuing with the material from the pulverizer, will draw off the finer particles, while the heavier will fall by gravity, as before, and again reach the pulverizer.

It will be seen that from the feeding of the material into the machine until its discharge therefrom in a pulverized condition the entire action of the apparatus is automatic.

We find this machine superior to any other known to us for the reduction of some materials, such as sawdust, &c.,

While we prefer to use the sectional lining-l plates, it is evident that they may be dispensed with and that the projections may be upon the inner face of the casing.

We claiml. In a pulverizer, the co`mbination, with a cylindrical separating-chamber' having projections on its peripheral wall disposed angularly with reference to each other, whereby to provide zigzag passages for the material undergoingl reduction, of a rotatable shaft within said chamber, provided with beaters adapted to operate close to the peripheral wall of the chamber and between the projections thereof, substantially as described.

2. In a pulverizer, the combination, with a pulverizing-chamber, of a sectional lining therefor provided with projections having forwardly-projecting thin edges and arranged in rows circumferentially of the chamber, and an operating-space between said rows, and a rotatable shaft within said chamber, provided with beaters adapted to operate within the spaces between the rows of projections, substantially as described.

3. In a pulverizer, the combination, with a cylindrical separating-chamber having pro- IOO IIO

jeotions in its peripheral Wall disposed anguthe projections thereof, substantially as delarly with reference to each other, whereby scribed.

to provide zigzag passages for the material undergoing` reduction, of a rotatable shaft within said chamber, provided with beaters set at an angle to the longitudinal axis of the machine and adapted to operate close to the peripheral Wall of the chamber and between GEORGE RAYMOND. ALBERT RAYMOND.

Witnesses:

FREDERICK C. GOODWIN, T. D. BUTLER. 

